A/F Gauge Question

I have a PR3 Ecu and a Field SFC vtec Controller.
I just got an Autometer Air/Fuel gauge.
I want to be able to see the results of the changes I make on the Field with
the Autometer Gauge.
I have a 4 into 1 header and I have added O2 bungs to runners 2 and 4
up by the head to simulate the stock setup.
Heres where I need some advice.
The gauge needs to look at an O2 signal but I have two O2 signals.

I have 2 ideas:

1. Two A/F Gauges, one for each O2
2. Add a O2 at the collector and send that signal to a single gauge.

I think adding a 3rd O2 at the collector is probably the way to go but I would sure
appreciate some input.
Anyone been there done that?

And just what part of it is worthless.
The part where I want to use an A/F gauge to look at the A/F mixture?

Or maybe the part where I am using 2 single wire O2s on a PR3
I refer you to:http://www.hondata.com/techo2problem.html
My PR3 is looking for that narrow signal.
The ECU is using that signal as a stopping point when it
dithers between rich and lean.
How would a wideband help a OBD0 PR3 ecu?

Or is it the Field controller you find worthless.

I'm thinking your answer was worthless.
Looking at the primary o2 only tells me about 1 bank of cylinders.
Maybe part of your answer wasn't worthless.
Maybe a wideband o2 at the collector to look at the overall gases.
Anyone with an answer that doesn't have 5' of smart ass with it.